New HS2 viaduct design to halve carbon emissions

Aaron Morby 3 years ago
Share

HS2 designers are on track to more than halve the amount of embedded carbon in one of the project’s main viaducts.

French TGV-inspired double composite design for Wendover Dean Viaduct in Buckinghamshire
French TGV-inspired double composite design for Wendover Dean Viaduct in Buckinghamshire

The innovative ‘double composite’ design is being used for the 450m long Wendover Dean Viaduct in Buckinghamshire.

It involves two steel girders sandwiched between two layers of reinforced concrete to create a super-strong but lightweight span.

Designed by a team made up of Eiffage, Kier, Ferrovial and BAM Nuttall – working with their design JV partner Arcadis Setec and COWI and architect Moxon – the viaduct is one of 50 being built on the first phase of HS2 between London and the West Midlands.

Applying lessons from the use of double composite structures on the latest French TGV lines, the British team has cut the amount of embedded carbon in the viaduct by 7,433 tonnes – the equivalent of 20,500 return flights from London to Edinburgh.

EKFB’s technical director Janice McKenna said: “This viaduct was inspired by the innovative design in France, but has been enhanced and developed in the context of the Chilterns.”

As well as cutting the amount of concrete and steel, the slender design reduces the silhouette of the structure.

Nine evenly spaced piers, some up to 14m tall, will support the deck of the viaduct and in a further improvement to the original design will now be cast in pieces offsite.

The beams themselves will be made from weathering steel, which will age to a dark russet finish and echo the natural tones of the surrounding landscape. Total steel weight is around 1400 tonnes.

When viewed from a distance, against the weathered steel, the pale concrete parapet will appear as a thin horizontal band hovering over the slender piers making the whole structure look thinner.

HS2’s Project Client Director Ambrose McGuire said: “We’re serious about reducing the amount of carbon we use during construction, and Wendover Dean is a great example of how we’re using the latest engineering techniques to do just that.

“Concrete is one of the construction industries’ biggest sources of embedded carbon – and this design will help us cut our carbon footprint while delivering a lighter, stronger and more elegant structure.”

Latest news

Willmott Dixon exits stage left from Essex theatre contract

Contract re-tendering shines spotlight on growing schism between contractors and clients
2 hours ago

Purpose build student schemes to surge again

Unite assembles record £1.3bn pipeline as fall in HMO supply boosts PBSA sector
1 hour ago

Bidding starts for £1.4bn Midlands Rail Hub Alliance

Alliance will deliver upgrades to rail lines and stations around Birmingham and nearby towns
2 hours ago

Brickability sounds warning over materials demand

Distributor sees lower sales lasting for longer before house building recovers
1 hour ago

English Cities Fund raises extra £200m for work pipeline

Muse, Homes England, L&G partnership to double in size
2 hours ago

Go-ahead for 64 homes at former Glasgow Coliseum theatre

Robertson-owned developer Urban Union to build four housing blocks at site
30 mins ago

Competition probe launched into 8 major house builders

Cartel watchdog says volume house builders may have exchanged competitively sensitive information
1 day ago

Cement-free concrete firm falls into administration

DB Group also owned Pudlo waterproofing products
1 day ago

Everton Stadium now structurally complete

Laing O'Rourke lifts final concrete terrace section into place
1 day ago

HS2 launches third London Northolt tunnel TBM

1,700 tonne machine begins 3.4mile dig under the capital
1 day ago

Willmott Dixon set for Manchester science park job

Contractor understood to be in final stages of talks to land £75m Greenheys building
4 days ago

Transport jobs get £4.7bn of cancelled HS2 cash

Government details funding for North and Midlands from 2025
1 day ago

Stewart Milne went down owing supply chain £153m

So far 1,375 firms have come forward with unpaid bills
5 days ago

Didcot disaster investigation enters its ninth year

Still no answers for families of quartet killed in demolition collapse
4 days ago

Mount Anvil wins £275m Westminster estate renewal

First phase of Church Street area regeneration will deliver 400 new homes and a library
5 days ago

Trio of A47 road upgrades to go-ahead as legal challenge fails

20-month delay adds tens of millions to dualling costs
4 days ago

Skanska and Morgan Sindall win £277m duo of Cambridge jobs

Railpen awards £200m Botanic Place and £77m Devonshire Gardens office jobs
5 days ago

Offsite specialist Merit sees profits grow

Contractor sees further growth in turnover and profits
4 days ago

Morgan Sindall delivers another record year of profit

Revenue tops £4bn as pre-tax profit soars 70% to £144m
5 days ago

Galliford Try nets two pipelines and road job worth £98m

Firm wins £64m of Thames Water pipelines and Halifax road improvements
4 days ago

HS2 viaduct blunder over wonky concrete segments

Align JV now drilling out concrete joint as part of week-long remedial work
6 days ago

City of London hots up as 9m sq ft under construction

Investors return to City as "10 Cheesgraters" of floorspace under construction
5 days ago

Four arrested in £140m property fraud probe

Serious Fraud Office investigating collapse of property developer Signature Group
6 days ago

McLaren gets green light for 31-storey student tower

Revamp of historic Birmingham site will provide 759 student beds and 189 apartments
5 days ago

BT Tower to become hotel

New owner MCR Hotels to transform iconic building
5 days ago

Plans in for first phase of £1.7bn ID Manchester

Plan to reinvent 1960s Renold Building as a new innovation hub
5 days ago

London £3bn housing framework out to tender

SMEs allocated slots on London Construction Programme housing framework refresh
6 days ago

BAM wins first major RAAC school rebuild

Contractor seals £46m deal for St Leonards school in Durham
6 days ago

Failed strip out specialist owes £1.5m to supply chain

More than 100 subcontractors and suppliers left with unpaid bills by Type Ten Limited
6 days ago

Councils to turn screw on building owners over fire safety upgrades

Government tells councils to step up legal action against rogue building owners
6 days ago

Contractor services